Juice extractor



June 7, 1938. c. H. s'rElNBlss JUICE EXTRACTOR `Filed May 7, 1934 l 71% a/MJM/ ATTORNEYS A VM Patented June v7, 1938 i* I UNI-TED STATES PATENT oFFlcsg-f Y l 2,119,972, l Y

JUICE sx'mAcron Carl H. Steinbiss, Milwaukee, Wis., assigner to Max Hauser, Milwaukee, Wis.

Application May '-7, 1934, Serial No. 724,417

v Claims. (Cl. 10U- 48) This invention relates to improvements in juice sages 25 and 29, respectively, through the juice extractors. collecting chamber 8.

The objects of the invention relate rather spe- Beyond the integral collar 29, the shaft yI1 carcifically to the improvement o f the mechanical ries unitarily a key 3D, which has radially pro- 5 construction of juice extractors employing a jecting lugs at 3| releasably engageable behind 5 screw for advancing the pulp, means for afrordthe flanges 32, which are formed `integrally with ing variable resistance to the escape of the pulp, casting 5, as best shown in Figures 3 and 4. The and means for collecting and discharging the key includes a hand lever 34 which facilitates its juice, oscillation aboutl shaft I1, whereby the lugs 3| By means of the present invention it is sought may either be registered with the spaced anges 10 to improve the form of the casting which com- 32, as shown in Figure 4, for Athe removal of `the prises the compression chamber and provides shaft and screw, or may be locked behind such the discharge spouts leading therefrom; to pro-V flanges to provide a thrust bearing to receive the vide for an assembly of parts which facilitates axial thrust of the screw.

the cleaning of the extraction chamber, and the The key 30 is unitarily held in assembled re- 15 associated parts of the device; to facilitate the lation to the shaft by means of the handle 35 used application and removal of the screw; to profor the rotation of the shaft, the hub portion of vide an improved type of strainer; and to minithe handle being permanently secured to the miZe the possibility of the escape of vjuice along shaft by a cross pin 36 as shown in Figure l.

the bearings of the screw. When the key 3U is moved to the unlocked positionv 20 In the drawing: shown in Figure 4, the handle 35 and the Ashaft Figure 1 shows the device partially in side ele- I5 may be withdrawn axially from the casting 5 vation and partially in vertical section axially of toward the rear.

the screw. v At the side of the forward end portion of the Figure 2 is a view taken in a section in a plane casting is a port 38 through which the pulp es- 25 indicated at 2 2 in Figure 1. capes under the regulation of a screw 39 which is Figure 3 isa view in horizontal axial section threaded into a boss 40 comprising an vintegral through the juice extraction chamber. part of casting 5. As is clearly indicated in Fig- Figure 4 is a detail View on a large scale shoW- ure 2, the raising of screW 39 will increase the ing the rear end of the exterior chamber in eleeffective capacity of the port 33. While in the 30 vation, position illustrated in Figure 2, the screw sub- Like parts are designated by the same reference stantially crosses port 38. Below screw 39, the characters throughout the several views. casting 5 is integrally provided with a discharge The body of the device comprises a casting 5 spout 4I, beneath which a dish may be placed which includes integrally a hopper 6, a juice exto collect the pulp. Y 35k traction chamber 1, a juice collecting chamber The juice extracted from the pulp by the op- 8, a support 9, and a C clamp bracket Ill. The eration of the screw I5 thereon is separated from movable portion of the clamp comprises the conthe pulp by means of the strainer 42 which comventional screw II and hand wheel l2. prises the partition between the extraction cham- The screw I5 comprises a helical thread I 5 ber 1 and the juice collecting chamber 8. Y Since 40 wound upon a shaft I1, which increases in cross it is necessary that this strainer would stand a section from the rear end of the device toward considerable degree of pressure, means is prothe forward end thereof, whereby gradually -to vided to reinforce it. The strainer comprises a reduce the capacity of the compression chamber foraminous plate bent to an arcuate form in cross 45 1. The shaft is provided integrally with collars section, as best appears in Figure 2, to conform 45 I8 at its rear end and I9 at its forward end, which to the path of travel Yof the peripheral portion of are fitted closely into complementary bearings thread I6. The marginal portions of thel screen 20 and 2|, respectively, which are formed in the rest in shallow recesses formed at 43 in the incasting 5. terior wall of the chamber 1.

The collars are peripherally grooved at 22 In order to maintain the screen properly cen- 50 and the bearing surface 2| has a complementary tered in its recesses, While at the same time reundercut groove at 24, the grooves being adapted inforcing the central portions of the screen, a to collect any juice tending to lowpast the bearrib is made by folding the intermediate portion ings, and thereby to escape from the juice extracof the screen at 45. This rib is received into the tion chamber. The grooves are drained by pasnotches 46 and 41 formed between the endmost 55 Y lugl'sl and 49 of afseries of lugs 50 disposed at from said pulp discharge port to receive material intervals along the sides of casting 5 to provide ,additional support for the screen.

.The bottom of the juicefcollecting chamber 8 below the screen is closed, except at the .forward Vend of such chamber, where it drains intoa spout 52, whichis opposite a pulp discharge spout 4l.

To prevent the pulp from rotating with the screwin chamber 1, the said chamber is preferably longitudinally grooved at 53,:as best' shown in Figure 2. 1 v

The device is usable to extract the juice from practically any fruit or vegetable fed to it in pieces of such size as will be receivable into the hopper 6. The resistance offered to the escape of `the pulp by means of the adjustable screw 39'will determine the extent to which the juice will be extracted therefrom. Y 1,

The fact that the key is unitarily assembled with the handle and screw I5 is a factor'contributing to= vthe facility with which the device may be cleaned. It will be noted that the key constitutes an instantly detachable means for positively anchoring thescrew, and when this key is turned to its figure 4 position, there are very few parts` of the apparatus requiring separate handling in the removal of the screw for the cleansing of the screw and the rest of the apparatus.

I claim:

1. In a juice extractor, the combination with a casing providing a cylindrical extraction chamber, a juice collecting chamber therebeneathand an opening affording communication between said chambers, said casing providing ports at one end of the casing opening in opposite vdirections laterallyfrom the extraction chamber and the juice collecting chamber respectively, a screen comprising a partition across said opening between said chambers, a screw in Vthe extraction chamber, and means integral with said casing providing delivery spouts for pulp and juice, said means comprising a wall connected with said casing and inclined downwardly and outwardly from one'of said ports, and a second wall connected with said rst wall intermediateitsupper and lower ends and extending laterally beneath the other of said ports.

. 2. In a juice extractor,Y the combination with a feedscrew; of a chamber casting providing bearings for saidscrew, a hopper inlet, an extraction Vchamber in which said screw is disposed, said chamber being of ka form generally circular in cross section and provided with a discharge slot in its bottom, a juice collecting chamber therebeneath, and a pulp discharge port in its side adjacent the end remote from the hopper; a realso comprising 'a second spout leading laterally lecting chamber,V said juice collecting'chamber j positioned beneath said extraction chamber and having an opening affording communication bel tween said chambers, al series of lugs projecting centrally of' said casingV from the side walls on said lugs and extending across said opening, saidscreen being of arcuate form generally conforming to the shape of the extraction chamber,

rthereof adjacent said opening, a screen. supported f a reinforcing rib extending longitudinally of said j Y screen on the under surface thereof between the Y said lugs, and supporting means integral with said casing for the ends of said screen, said supporting means being notched to receive said rib. 4. In a juice extractor, the combination with aV rotatable screw, of a chamber havinginlet and outlet ends, the inlet end being provided with a feed hopper, and provided adjacent said ends with bearings for said screw, said chamber having a-restricted dischargevopening comprising a substantially vertical slot inits side wall adjacent the bearing of the discharge endthereof and also having a foraminous bottom wall extending beneath said screw past said slot substantially to said last mentioned bearing, a juice collector beneathsaid foraminous wall, and a control screw adjustable lengthwise of said slot and substantially tangential with respect to said screw to regulate the resistance to discharge of solids through said slot, said slot beingelevated above said foraminous wall to facilitate the expression of alljuices through said wall to said collector.

5. In a juice extractor, the combination of a charge end, Vmeans integral with said chamber- Y providing a; juice collectingV receptacle therebeneath and communicating with said chamber substantially throughout the length thereof, discharge spouts leading from theV juice collector and from such slot in opposite lateral directions,

a foraminous wall comprising a partition between said expression chamber and said juice collector, said wall being arcuate and substantially concentric with the axis of said bearings, an expression screw operable in said bearings,'and a second Y screw comprising a gate threaded to a portion of said chamber and extending longitudinallyV of said slot and substantially tangential with respect to said expression screw, whereby to control the resistance to discharge of solids through said slot, said slot being located substantially` above said foraminous wall and saidl wall being Vcontinued past said slot substantially to the bearing at the discharge end of the chamber, whereby to facilitate the complete expression of all juices from solids in said expression chamber and the delivery-of such juices through said wall instead of through said slot. Y

CARL H. STEINBISS. 

